So Confused! HELP
 

ok i have a 88 vert NA. dropped a 87 engine in it and info says the 87 needs low imp. injectors. i have the lows and the resistor pack. theres a diff between saturated and peak and hold injectors. whats the diff? i have a vin split in 87 and i ohm tested my injectors there good, i have a n326 ecu and n326 sensors.

The whole problem with this car was i could rap it out in nuetral but when i put it in 1st and start to go it would want to die.. we swapped ecu's(n326, n327, n322 and a couple diff afm and nothing made a diff. it would still want to die under load

i need to know all the sensors and what injectors exactly to put in there. i have the red top 1350 3 ohm injectors but does it matter if there peak and hold.???

All emissions removed, no air pump, no a/c, no power steering. all vacum lines checked all new gaskets, good spark, great compression... please help

87 NA engine